mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 12:12:15 +02:00
127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2016 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// Environmental variables
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#ifndef OPENVPN_COMMON_ENVIRON_H
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#define OPENVPN_COMMON_ENVIRON_H
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#include <string>
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#include <cstring>
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#include <vector>
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#include <utility>
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#include <openvpn/common/size.hpp>
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extern char **environ;
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namespace openvpn {
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class Environ : public std::vector<std::string>
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{
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public:
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static std::string find_static(const std::string& name)
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{
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for (char **e = ::environ; *e != NULL; ++e)
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{
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const char *eq = ::strchr(*e, '=');
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if (eq && eq > *e)
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{
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const size_t namelen = eq - *e;
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if (name.length() == namelen && ::strncmp(name.c_str(), *e, namelen) == 0)
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return std::string(eq+1);
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}
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}
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return "";
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}
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void load_from_environ()
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{
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reserve(64);
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for (char **e = ::environ; *e != NULL; ++e)
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emplace_back(*e);
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}
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std::string to_string() const
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{
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std::string ret;
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ret.reserve(512);
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for (const auto &s : *this)
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{
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ret += s;
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ret += '\n';
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}
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return ret;
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}
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int find_index(const std::string& name) const
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{
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for (int i = 0; i < size(); ++i)
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{
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const std::string& s = (*this)[i];
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const size_t pos = s.find_first_of('=');
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if (pos != std::string::npos)
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{
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if (name == s.substr(0, pos))
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return i;
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}
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else
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{
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if (name == s)
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return i;
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}
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}
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return -1;
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}
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std::string find(const std::string& name) const
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{
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const int i = find_index(name);
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if (i >= 0)
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return value(i);
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else
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return "";
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}
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std::string value(const size_t idx) const
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{
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const std::string& s = (*this)[idx];
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const size_t pos = s.find_first_of('=');
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if (pos != std::string::npos)
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return s.substr(pos+1);
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else
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return "";
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}
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void assign(const std::string& name, const std::string& value)
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{
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std::string nv = name + '=' + value;
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const int i = find_index(name);
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if (i >= 0)
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(*this)[i] = std::move(nv);
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else
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push_back(std::move(nv));
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}
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};
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}
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#endif
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